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Article
| Open Access
Structural insights into auxin recognition and efflux by Arabidopsis PIN1
Structures of the Arabidopsis thaliana auxin exporter PIN1 in the apo state, bound to the natural auxin or bound to an inhibitor provide insights into the polar auxin transport mechanisms mediated by PIN family transporters.
- Zhisen Yang
- , Jing Xia
- & Linfeng Sun
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Structures and mechanisms of the Arabidopsis auxin transporter PIN3
Arabidopsis thaliana PIN3 structures reveal the molecular mechanisms of the transport of indole-3-acetic acid and the inhibition of polar auxin transport by N-1-naphthylphthalamic acid.
- Nannan Su
- , Aiqin Zhu
- & Jiangtao Guo
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Article
| Open Access
Structures and mechanism of the plant PIN-FORMED auxin transporter
Structural and biophysical analysis of the Arabidopsis thaliana auxin transporter PIN8 reveal that PIN transporters export auxin using an elevator mechanism.
- Kien Lam Ung
- , Mikael Winkler
- & Bjørn Panyella Pedersen
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Cell surface and intracellular auxin signalling for H+ fluxes in root growth
Auxin rapidly modulates root growth through simultaneous activation of two opposing mechanisms—TMK1-mediated apoplast acidification and TIR1/AFB-mediated apoplast alkalinization.
- Lanxin Li
- , Inge Verstraeten
- & Jiří Friml
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Article
| Open Access
TMK-based cell-surface auxin signalling activates cell-wall acidification
Auxin induces transmembrane-kinase-dependent activation of H+-ATPase in the plasma membrane through phosphorylation of its penultimate threonine residue, promoting apoplastic acidification and hypocotyl cell elongation in Arabidopsis.
- Wenwei Lin
- , Xiang Zhou
- & Zhenbiao Yang
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Article
| Open Access
A biosensor for the direct visualization of auxin
A genetically encoded sensor for the quantitative visualization of auxin distribution in plants enables real-time monitoring of its uptake and clearance by individual cells and within cellular compartments.
- Ole Herud-Sikimić
- , Andre C. Stiel
- & Gerd Jürgens
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A network of transcriptional repressors modulates auxin responses
Genes encoding the class A auxin-response factor group of plant transcriptional activators reside in constitutively open chromatin, enabling their continual regulation by transcriptional repressors to modulate auxin signalling throughout development.
- Jekaterina Truskina
- , Jingyi Han
- & Teva Vernoux
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Letter |
TMK1-mediated auxin signalling regulates differential growth of the apical hook
In Arabidopsis thaliana, a newly identified auxin signalling pathway that involves TMK1 protein cleavage and IAA32 and IAA34 transcriptional repressors mediates complex developmental outcomes by allowing distinct interpretations of varying concentrations of cellular auxin.
- Min Cao
- , Rong Chen
- & Tongda Xu
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Letter |
High levels of auxin signalling define the stem-cell organizer of the vascular cambium
In the roots of Arabidopsis thaliana, cells with xylem identity and high levels of auxin signalling function as organizer cells that direct neighbouring vascular cambial cells to act as stem cells.
- Ondřej Smetana
- , Riikka Mäkilä
- & Ari Pekka Mähönen
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Letter |
A molecular rheostat adjusts auxin flux to promote root protophloem differentiation
The coordinated action of BREVIS RADIX (BRX) and PROTEIN KINASE ASSOCIATED WITH BRX (PAX) regulates auxin flux during the development of protophloem sieve elements in the root meristem of Arabidopsis.
- P. Marhava
- , A. E. L. Bassukas
- & C. S. Hardtke
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Letter |
Inhibition of cell expansion by rapid ABP1-mediated auxin effect on microtubules
In roots and dark-grown hypocotyls of Arabidopsis thaliana, ABP1-mediated auxin signalling induces swift re-orientation of the microtubule cytoskeleton from transverse to longitudinal, thus inhibiting cell expansion.
- Xu Chen
- , Laurie Grandont
- & Jiří Friml
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Letter |
PLETHORA gradient formation mechanism separates auxin responses
Through a combination of experimental and computational approaches, the interplay between the plant hormone auxin and the auxin-induced PLETHORA transcription factors is shown to control zonation and gravity-prompted growth movements in plants.
- Ari Pekka Mähönen
- , Kirsten ten Tusscher
- & Ben Scheres
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Letter |
A novel sensor to map auxin response and distribution at high spatio-temporal resolution
A new auxin sensor is used to reveal complex dynamic patterns of hormone distribution in development.
- Géraldine Brunoud
- , Darren M. Wells
- & Teva Vernoux
Adenylate cyclase activity of TIR1/AFB auxin receptors in plants